Screen



2 Sheets-Sheet 1 O. G. KEIL SCREEN Filed March 5o, 1936 .iTIlT Illlfllllfll April 26, 1938.

pril 26, 19378. Q G, KEIL 2,115,110

SCREEN y y Filed March 30, 1936 2 Sheets-Sheet 2 Patented Apr. 26, 1938 UNITED STAT as.A

v2,115,1104 l "I PATENT ori-flor:

SCREEN Otto G. Keil, Houston, Tex., assignor to Gulf Engineers Inc., Houston, Tex., a corporation of Texas Appuiatnm Maren' so,l 1936, serial` No. '11.613

foreign matter therefrom.

' It is another object of the invention to pro-` vide screening apparatus ofnthe vtype described having a mud-collecting ,box ...and a declining screen .above the box with noveluneans for .vibrating the screen to facilitate the movement of the fluid, to be screened, thereover.

The inventioni also embodies a novel type of screen havingysectional screening surfaces arranged in stepped ,relationv whereby to more ef.- fectively agitate thev material to be screenedv in order to accomplish a more effective separation of the coarser particles and" foreign material. from the drilling iiuid to be recovered.

It is still another object o f the invention to provide novel means for mounting vthe .screen over the mud box. n l

p In carrying on well-'drilling operations by the rotary drilling processthe drilling fluid is forced .down through the drill stem tothe bottom of' -the bore andreturned back 1 i`p aboutY said stem to the ground surface.l This fluid is laden with solid material to give it the required weight to maintain the walls of the well bore during the drilling process. This material is usually'flnly ground and at the" present timeis a commercial product which can beobtained only at considerabl'e expense -and consequently it-.is desirable to maintain this drilling fluidor drillingmud' in as pure 1a state as' possible. VAccordingly the screen herein described has. been provided for the purpose o'f screening the drilling uid returning from theewell to; remove therefrom the drill cuttings, coarse particles, and other foreign matter accumulated in thev drilling fluid dur-- ing the drillingv operations. 'The screen herein described has proven very eiilcient for the purpose intended. and while ithas been particu-k larly designed for that purpose;- yet itis capable oi' general use for similar purposes. with the above and other objects in view, the invention has particular relation to certain novel features of construction, operation, yand arrangement of parts, an example of which is given in this specication and illustrated in the accompanying drawings wherein: l Figure 1 shows a` plan view of they screen,V partly broken away. Figure 2 shows a side view, partly broken away and partly in section.

2 Claims; (Cl. 209-326) Figure 3 shows a cross-sectional on the line 3 3 of Figure y2.

Figure 4 shows an inner end view of the distributing chute, and

Figure 5 shows a fragmentary cross-sectional view taken on. the line 5-5 oi Figure 1.

view taken Referring now more particularly tothe draw-n ings wherein like numerals of reference designate the same partsin each of the gures, the

numeral I designatesv a collecting box which is -mounted on suitable runners 2, f2, and which has the inside,` forwardly'declining angle bars),

3secured therein andforming supports forthe screen to be hereinafter described. 'Ihe box I -may be formed of anyksuitable material, preferably sheet metal.

Above. the collecting-box I there is a forwardly declining screen having the side members I, 4,

preferably formed `of channelv irons which are lconnected by the upperfandv lower series of connecting tubes 5, G.- whose ends are welded or otherwise securelyattached to the side members 4. The tubes 5,\6, have the surrounding, spaced, 'supporting rings x1, 8, formed of resilient mate- 'I'he outer` margins of the screening''elements` areclamped to the side members 4 by means of the* half-round upper-,and lower clamps II,

\ II, I2, I2, and the V inner margins of the sections of the screening elements are clamped together 7 by similar half-round complemental clamps,

I3 and I4, I4; Theiclampsil, II, and I2, I2,

are bolted tothe side members 4,4,v byy suitable bolts which pass 'through said .clamps and said members and` .the, adiaceni@'ginisirgins` of,V the:

screening elements ,areclamped between ysaid side members .andjfthelower margins of .the

adjaeent'mergins efiheiseeuosof the, eereen-r partitions I5. I6. areclamped between upper vmarginsfiof the respective clampsl I3, I4, in a manner as is clearlyV illustrated in Figure3.

The screening elements 9, Ilare disposed so ask 

